Vacuum feed system



Ju ne 2 me. 1,589,412

E. R. HUNTLEY VACUUM FEED SYSTEM Filed April '7, 1920 2 Sheets-Sheet 1 iT m a 1 g i. a INVENTOR. I g y Ernesi Rffuniley BY I v h f I 2 TTORNEYJune 22, I926. 1,589,412

E. R. HUNTLEY VACUUM FEED SYSTEM IN'VENTOR. Ernest R.Huntley ATTORNEYS.

Patented June 22, I

"UNITED-STATES PATENT OFFICE.

Ir a. or rorrmo, omo, assrenon in museum 1 I PORTION, OF TOLEDO, 031,ACORPORATION 01' DELAWARE.

vacuum ram) sYs'rmr.

Application 11 1} April 7, mo, semi Io. 372,040.

:1 My'invention relates to improvements liquid ;fuel traising systemsintended pnmarily for use in -automob1les.i

One of the objects of .the invention is the I provision of fuel raisingapparatus, in which the necessity for an auxiliary fuel tank iseliminated. Another object of provision of a system in which the .fuel1s pumped up to thecarbureter, but in which the moving parts of the pumpdo not come incontact with the fuel. I Another object is the provisionof a float controlled valve for interrupting communication between thepumping cylinder and a pumping chamber through which the fuel flows,such communication being interiulpted whenever the output of the pumpeirceeds the amount of fuel being used by tlicl car bureter.

Other objects, and objects relatin to de-,

tails of construction and economics 0 manufacture, will appear as Iproceed with the description of that embodiment of the in-. vention,which, for the purposes of the present application I have illustrated inthe accompanying drawings, in which-- Figure I is a longitudinal sectionof a v casing in which are located the air cylinder and the floatchamber of my pump, the easing including also parts ofan oil pump forthe supply of lubricant to the engine, the latter invention; 1

Fig. IIis a bottom lanview partially in horizontal section on t e'line11-11, Fig. I.

Fig. III is a View principally in vertical section taken substantiallyIII, Fig. I. I

Fig. IV is a more or less diagrammatic view showing the invention asapplied in connection w1th the engine of an automobile. Similarreference characters refer to like parts throughout the views. Referringfirst to Fig. IV, 10 indicates the main fuel tank of an automobile, fromwhich leads the pipe 11 through which fuel is drawn by the located atthe side on the line III-e of a gas en 'ne 12. pro erably below thelevel of the car ureter 13 with which it is connected by the pipe 14.The oil pump lifts the invention is the eature forming no part of thepresent The structure of the fuel is shown in detail 1n Figs. I, II andI w ere'18 incase for a distance to constitute a cylinder for a hollowpiston 21, which is closed at its rear end and there provided with abearin surface for engagement by a cam 22 fixe upon a shaft v23 drivenby the engine. The oil. pumping cylinder 24 is closed at its forward endby a partition 25 having a central elongated bearing 26 in'which slidesa rod 27 which is secured at its rear end to the closed 'rear end of thepiston 21. A coil spring 28 bears at one end against said partition 25and at the other end against the piston 21. y

Depending from the forward end of cylinder 24 is a small chamber 29having a, nip le .30 threaded into the bottom thereof or attachment tothe pipe 15. A ball check 31 seats itself in the top of the nipple 30and is prevented by an inwardl extending arm 32 from rising too far 0its seat. Extending laterally in opposite. directions from the chamber29 are'the valve chambers 33 and 34, in which are located spring pressedball checks '35 and 36L Suitably connected to the valve chambers are thepipes 16 and 17 throu h which'the lubricant is fed to parts of t eengine requiring it. One of the springs controllin the ball checks 35and 36 may be of sti er wire than the other in order to cause a lesserproportion of'the oil to flow through onefp'i than tlrl'ough the other,if this is deeme desira e.

Forward of the partition 25 the casing is formed to provide an aircylinder 37 which is closed at its front end by a threaded disk 1 38,the removal of which permits access to the cylinder. On the forward endof rod 27 issecured a piston 39 provided with bypasses 40 adapted toregister through a peripheral groove 40 with a port 41 through thecylinder when. the piston is at the forward limit of its motion. In therear of the cyinder 37 is a small breather opening 42. On the lower sideof the cylinder 37, and extending back from its forthe rear end of whichcommunicates with a hole 44 through the cylinder which hole connects thepassage 43 with the interior of a float chamber or pumping chamber 45which is preferably cast integral with the cylinder 37. The bottom ofthis chamber is a threaded disk 46 which has a central bore in its upperside constituting a guide for a' valve stem 47, on %e u per end of whichis a conical valve 4 float 49 is mounted upon the stem 47 and is adaptedto raise the valve piece 48 to close the hole 44 when the level ofliquid in the chamber reaches a predetermined hei ht.

Into one side of the chain r a passage 50 opens. An upwardly openinginlet check valve 51 is mounted. at the end of this assage and isadapted to prevent back ow of liquid after the latter has been raisedinto the chamber 45. Li uid enters the passage 50 through a nipp e 52 to'which is attached the pipe 11 leading to the fuel tank 10 (Fig. IV). Apassage 53 leads from the other vside of the chamber 45 'to a valvechamber 54 in which is located an upwardly opening check valve 55. A

nipple 56 is threaded into the casting above the valve chamber 54 andserves as a connector for the pipe 14 leading to the carbureter 13.

Operation The cam 22 rotating at a speed proportional to the speed ofthe engine drives the piston 21 and rod 27 to the left (Fig. I), whilethe spring 28 causes the return movement. The piston 21 on its suctionstroke draws a charge of oil up through pipe 15, the ball checks 35 and36 remaining seated. On

the comlpression stroke the latter valves open and ba check 31 closes.The charge of oil is then forced outward through pipes 16 and 17 toparts of the engine needing lubrication.

At the same time the piston 39 is reci rocated. Assuming that the levelof fue in' the pumping chamber 45 is not high enough to cause the floatto actuate valve 48, then the hole 44 is 0 on and on the suction strokeof the piston illie air in chamber 45 is exhausted.

a pressure, being transmitted through the quid, lifts valve 55 andforces a charge of Atmospheric pressure upon the fuel in tank 10 thencauses fuel to rise in and said air cylinder, means 1,5ea47s fuel intopipe 14, and ifthe latter pipe be front of the piston and above theliquid in the chamber 45, thus preparing the apparatus for the nextsuction stroke. The'operation continues in this manner until the levelof liquid in the chamber 45 causes the float to raise the valve 48 andclose the hole 44, whereupon the pressure in chamber 45 remains constantand the pumping action consequently ceases. At such times the air inchamber 45' will always be under" ressure as there ,will undoubtedly belea age 'of air around the valve 48 on the compression" stroke, theressure tendin to unseat the valve. On t e exhaust stro e, liowever, the

valve tends to close even tighter, and therefore the pressure built-upiii the chamber I 45 remains undisturbed. Now, as soon as further fuelis required by the carburetor its needle valve opens and permits thepressure in chamber 45 to force fuel up the pipe 14. The level inchamber 45 is thus lowered, and float 49 descends permitting valve 48 todescend and 0' en the hole 44. Thu the chamber 45 is en jected to theeffect 0 the next suction stroke of the piston, whereby fuel is raisedthrough pipe 11 into the chamber. In practice there will'be a very smallvariation in the fiiellevel in chamber 45 and the suction stroke of theiston 39 will be made effective to draw fue into the chamber 45 atfairly re and illustrated in the accompanlying drawings is susceptibleof considerab e variation 'without departing from the spirit thereof,

and therefore I sire to claim my inventionbroadly as well asspecifically, as. indicated by the appended claims.

I claim as my invention: j 1. In combination, a pumping chamber havingan inlet valve and an outlet valve for liquid to be pumped, a float in,saidchamber, an air 0 inder closed at one end, a piston slidabletherein, a connection between the top of said pumping chamber orconnecting "ar intervals, the j frequency of which wil depend upon theloa the cylinder with atmosphere at times cor-,

stroke, a valve controlled by said float for closing said firstmentioned connection when the level of liquid in the pumping chamberreaches a predetermined height, a second,

responding with bothends'of the piston" cylinder connected to said aircylinder, a

pump within said second cylinder, and single means for operating saidpump and said piston. I

2. In combination, a casing, a pumping chamber in the bottom of saidcasing having an inlet valve and an outlet valve for liquid to bepumped, an air chamber in said casing above said pumping chamber, saidcasing having a passage connecting said chambers, means for producingcompression and rarefaction alternately in said air cham' her, a floatin said'pumping chamber, a valve controlled by said float adapted toclose said passage, a liquid pump adjacent to said air chamber, singlemeans for operating said liquid pump, and compression and rare-:t'action producing means in said air chamber.

3. In a liquid feed system, the combination of a chamber; a plurality ofseparated pistons axially movable in said chamber; means normallyholding said pistons at one end of their movement and additional singlemeans operated to displace the piston from normal end position; andfloat control means connected to said chamber adapted to control thepumping operation of one of the pistons.

4. In pumping mechanism, the combination of a two-part cylinder;interconnected pistons axially movable one in each section of thecylinder; single means for reciprocating said pistons; and a floatcontrolled valve connected to one of said cylinder sections adapted tocontrol the pumping operation thereof.

5. In combination, a pump cylinder; a piston axially movable in saidcylinder; a second pump cylinder; a second piston movable in said secondcylinder; means for reciprocating one of said pistons; and additionalmeans for transmitting the reciprocation of said piston to the'otherpiston.

6. In combination, a pump cylinder; a piston axially movable in saidcylinder; a second pump cylinder; a second piston movable in said secondcylinder; means for reciprocating one of said pistons; additional meansfor transmitting the reciprocation of said piston to the other piston;and float control means adapted to control the action of one of saidpistons.

In testimony whereof I afiix my signature.

ERNEST R. HUNTLEY.

